Now months later we still experience the latency issue. It makes the phone feel super slow compared to my Verizon connection. I came to the same conclusion that the connection to the APN is the bottleneck. Coming from the West Coast, the APN is located on the East Coast / Atlanta region which makes all traffic being routed through there. Result: >150ms latency on everything you do (compared to 30-40ms on Verizon). Really really makes a huge difference, especially comparing iPhone 8 side-by-side.
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